(H)

A NEW SPECIES OF APHIS, OF THE GENUS
COLOPHA.

By MISS NETTIE MIDDLETON, ASST. ST. ENT., ILL.

Printed March '20th, 1878.

Colopha eragrostidis, uew sp.

Winged individual.—General color reddish-brown ; head black
;

prothorax yellowish, rest of the thorax and abdomen reddish brown
;

veins of the wings dark ; stigma pale brown.

Winciit, when first seen horizontal, but becoming erect, formed and
veined as usual ; the third vein in the anterior pair with only one fork

and obsolete nearly half way to the base of the fork ; the first and sec-

ond veins approximate very closely at the base. Posterior pair with
but one discoidal vein.

Antennae six jointed, with the suture's between the third and fourth

and between fifth and sixth transparent ;. first and second joints short

;

third about equal to the fourth, fifth and sixth united : the fourth and
fifth nearly equal in length

;
sixth very short, but little exceeding the

first and second united. The antennae as compared with the body are

very short, scarcely reaching to the base of the front wings ; not
tapering.

Wingless individual.—Body covered with a cottony substance ; beak
short, not extending to the base of the second pair of legs. No honey-
tubes. Length of the body .06 of an inch; to tip of wings .10 of
an inch.

This species was found September 1st, 1877, on the upper leaves and
fruit stems of a species of grass {^Et-agrostii^ poaeoides var. megastaehya)

,

the blades of the grass folding over the insects.

It is also found on some species of Panicum.
This evidently belongs to Mr. J. Monell's new genus CohpJia, as

the third vein of the front wing is but once forked, the hind wings
have but one discoidal vein, and the antennae are six-jointed.


	NaturalHistoryofIllinoisBulletin2.pdf